title: Contraceptive methods and induced abortions and their association with the risk of colon cancer in Shanghai, China.
mesh_terms: D000028:Abortion, Induced / Q000009:adverse effects*; D000328:Adult; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D003110:Colonic Neoplasms / Q000453:epidemiology / Q000209:etiology*; D003270:Contraceptive Agents / Q000009:adverse effects*; D003276:Contraceptives, Oral / Q000009:adverse effects; D005260:Female; D006801:Humans; D008875:Middle Aged; D016016:Proportional Hazards Models; D012307:Risk Factors; D011795:Surveys and Questionnaires
chemical_list: D003270:Contraceptive Agents; D003276:Contraceptives, Oral